Improvement in pump-valves



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CHARLES L. MERRILL, OF WATERTOWN. NEW YORK f Letters Patent No. 111,763, dated February 14, 18 71; entedsted February 13, 1871.

IMPROVEMENT m PUMP-VALVES;

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whoni it may concern:

Be it kuown'that I, CHARLES L. MERRILL, of Watertown,'Stat-e of New York, have invented certain new and 'nseful Improvements in Valves for Pumps; and I hereby declare this to he a full, true, andexact description of thesame, reference-hem g had to the accompanying drawing and tothe letters of reference markcd.thereon. v

The nature of my invention consists in the construction of a pnmp valve, which is provided with downwardly projecting curved arms or flanges, against which'the water strikes at each upward lift of the valve, thus causing it to revolve slowly upon its seat, so as to wear equally at-every point at thessame time.

Figure 1 is a section view of my valve and valveseat. Figure 2 is a. bottom view of the valve alone.

Letter A represents the valve-seat, which may be formed. ofany suitable material, and which has a screw-thread cut around its outer surface, sothat it can be screwed into the pump-barrel. I V

Extending from the inner surface of the seat A there is a'numher of supports 13, which form a. hub in the middle, in which the valve-stem works.

0 represents the valve, which is provided. with a stem, 1), on its underside, by means of which it is guided up. and down and held upon its seat.

Arranged around the stem,on the outer part of the valve, there is a number of downwardly-projecting arms or flanges, F, having a spilal curve at theiric'mter ends.

At each upward lift of the valve the water strikes against these curved arms, and causes the valve to make apartial revolution at each lift, so that in every twelve-to twenty lifts it turns completely around on its seat.

arms are placed around the outer ed;

ters Patent, is-- scribed.

' In using the ordinary valves where no provision is made for them to revolve, whenever pieces of gravel, dirt, or sediment of any kind happen to rest upon the valve-seat, the valve, inlifting'upand down, soon hammers it into the scat, causing the valve to leak so badly that the whole arrangement must be removed, so as to he-regronnd.

By making provision for the constant revolution, as

soon'as any foreign substance gets upon the seat, the valve, in turning around soon dislodges it, instead of merely driving it into the seat, or of inj nring it in one place only, so as to cause leakage.

Several attempts have been 'mMe to cause the valves to jrevolve; but, as the reaction of the water without causing the valvefto stick.

Havin thus described-myinvention, What claim as new, and desire to secure by Let- Avalveprovided with downwardly-projecting curved arms, arranged around its outer surface, leaving a water-way or passagebetween their rear ends and the valve-stem, substantially-as set; forth and dc- Witnesses: cn'ARLEsiL. MERRILL.

'BENJ. Lone, v

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